CN102896153A

CN102896153A - Rectification method for deformation of roller neck

Info

Publication number: CN102896153A
Application number: CN2012104251175A
Authority: CN
Inventors: 程志平; 吴昊; 张建
Original assignee: Sinosteel Xingtai Machinery and Mill Roll Co Ltd
Current assignee: Sinosteel Xingtai Machinery and Mill Roll Co Ltd
Priority date: 2012-10-31
Filing date: 2012-10-31
Publication date: 2013-01-30
Anticipated expiration: 2032-10-31
Also published as: CN102896153B

Abstract

The invention discloses a rectification method for deformation of a roller neck. According to the method, rectification can be carried out on the bended and deformed roller neck. The rectification method comprises the following steps that bending direction and deformation amount of a centrifugal roller neck are defined; the bending direction of the roller neck is vertically upward; the roller body part and the non-deformed roller neck are tightly wrapped with double-layer ceramic fiber of 20mm; an iron pillow is placed below the non-deformed roller neck to enable the iron pillow to be tightly contacted with the roller neck; the iron pillow is placed below the deformed roller pillow, and a heavy object is pressed on the deformed roller neck; armored thermocouples are respectively in positions of the deformed roller neck and the roller body to carry out temperature detection; heating equipment is turned on to heat the roller, and a rectification process is implemented; and the above operations are repeated to finish the rectification of the roller neck. By the adoption of the method, the rectification can be carried out on the bended and deformed roller neck, and the physical performance index of the roller body is not affected by heat of the rectification process.

Description

The roller neck correction method for deformation

Technical field

The present invention relates to a kind of reparation processing method of roll, refer in particular to the roller neck bearing calibration that a kind of breaker roll roll neck position occurs bending and deformation.

Background technology

In the roll use procedure, owing to the reasons such as operation and technique cause roller neck to occur bending and deformation, cause to continue using.Traditional bearing calibration of the roll that pair roller neck position occurs bending and deformation is to adopt heavy fresh processed method behind the backside coating metal material of the roll neck that mechanical pressure bearing calibration or employing bend.

Summary of the invention

The technical issues that need to address of the present invention provide a kind of method that can proofread and correct the roller neck that occurs bending and deformation, guarantee that simultaneously the physical performance index of the body of roll is unaffected.

For solving the problems of the technologies described above, the technical solution used in the present invention is:

A kind of roller neck correction method for deformation may further comprise the steps:

1), quantitative and mark: determine bending direction and the deflection of centrifugal roller roll neck and mark the roll neck crooked position according to roller technology and alignment requirements;

2), positioning: rotary roller before the firing equipment of packing into guarantees the bending direction of roller neck vertically upward;

3), preliminary treatment: with 20 millimeters thick double-layer ceramic fibers that roll barrel position and the roll neck parcel that do not deform is tight when packing firing equipment into;

4), shove charge fixes: with the roll firing equipment of packing into, placement pillow iron and make pillow iron and roller neck close contact below the roller neck that does not deform; Pillow iron is placed by roller neck bottom in distortion, leaves certain interval between this pillow iron and the roll neck as repairing size, presses weight at the roll neck that is out of shape;

5), install thermocouple additional: at distortion roll neck and body of roll place, press respectively armoured thermocouple, carry out temperature detection;

6), proofread and correct: open firing equipment, breaker roll heats, and carries out and proofreaies and correct treatment process;

7), repeat aforesaid operations, finish the correction of roller neck.

Further improvement of the present invention is: described firing equipment is gas burner.

Further concrete technical scheme of the present invention is: described correction treatment process is: furnace temperature rises to samming behind the 600-700 ℃ of plastic deformation temperatures district with 100-200 ℃/programming rate hourly, furnace temperature rises to samming behind the 600-700 ℃ of plastic deformation temperatures district with 100-200 ℃/programming rate hourly, after roll neck temperature to be deformed rises to 600 ℃, again rise to samming behind the 800-900 ℃ of humidity province with 100-200 ℃/hour programming rate, roll neck temperature to be deformed rises to 800-850 ℃, be incubated after 3-5 hour, furnace temperature with 50-100 ℃/per hour cooling rate with the distortion the near 100-150 of roll neck temperature ℃ humidity province after come out of the stove; In the roll neck temperature of control distortion, monitor body of roll temperature in the whole processing procedure.

Owing to adopted technique scheme, the obtained technological progress of the present invention is:

By the improvement of charging mode and the control of process operation, realized that same roll heats in same stove, the roll different parts can reach different temperatures as required, and maximum temperature difference can reach 350-400 ℃, both can deformation place be restored by high-temperature heating, make simultaneously the body of roll position that temperature can not be too high remain on low-temperature zone, guaranteed that the physical performance index of the body of roll is unaffected, it is useless to have avoided the roll product to cause.Adopt method of the present invention, not only can proofread and correct the roller neck that occurs bending and deformation, but also the physical performance index that can guarantee the body of roll is not subjected to the heat affecting of trimming process.

The specific embodiment

Below in conjunction with embodiment the present invention is described in further details:

Embodiment 1

A kind of model is that emitting of 1TLU121015-T1306RA roll held the roll neck bending, emits the about 89mm of central axis of the misalignment roll barrel of end roll neck end.The bottom roll neck does not deform.

The method that the roll of above-mentioned generation roll neck distortion is proofreaied and correct is as follows.

At first carry out the preparation of shove charge:

With roller rotational, make roll neck bending position vertically upward, even the departing from directly over roll barrel center line height point farthest is positioned at of crooked roll neck.

For tissue and the performance that guarantees the body of roll do not change in the heating repair process, before shove charge, use 20 millimeters thick ceramic fibres two-layer, roll barrel position and the bottom roll neck parcel that do not deform is tight, excess Temperature when preventing the heating of these positions.

Roll is loaded in the gas burner of MZ9 type, and prop up pad at the two ends of the body of roll with pillow iron, the bottom roll neck that uses simultaneously high pillow iron not deform props up pad firmly, makes pillow iron and the roll neck close contact that does not deform, the roll neck generation secondary deformation that does not deform when preventing from heating.Distortion emit the end roll neck just below, be well placed pillow iron, make pillow iron relative with roll neck, rest the head on the gap that will reserve 89mm between iron and the roll neck, this gap equals the distortion size of roll neck, namely repairs size.The end roll neck that emits in distortion presses weight simultaneously, and the auxiliary deformation roll neck recovers under Action of Gravity Field.Simultaneously on the distortion roll neck with the body of roll on, press respectively armoured thermocouple, the temperature of roll neck and the body of roll is monitored.

Carry out and proofread and correct treatment process:

Gas burner is heated up, programming rate is by furnace temperature 100-200 ℃/per hour control, doing samming when furnace temperature is warming up to 600-700 ℃ of plastic deformation temperatures district processes, the temperature of the roll neck that is out of shape in insulating process progressively raises, after roll neck temperature to be deformed rises to 600 ℃, furnace temperature is warming up to 800-900 ℃ and samming again with 100-200 ℃/hour speed again, roll neck temperature to be deformed rises to 800-850 ℃, be incubated after 3-5 hour, furnace temperature is cooled to the roll neck temperature take 50-100 ℃/speed hourly and comes out of the stove as 100-150 ℃, in the roll neck temperature of control distortion, monitor body of roll temperature in the whole processing procedure, heating up, samming, during insulation, body of roll temperature mustn't its above 500 ℃.The rear detection of coming out of the stove emits the neck bending partly to obtain repairing fully.

Claims

1. a roller neck correction method for deformation is characterized in that, may further comprise the steps:

7), repeat aforesaid operations, finish the correction of roller neck.

2. roller neck correction method for deformation according to claim 1, it is characterized in that: described firing equipment is gas burner.

3. roller neck correction method for deformation according to claim 2, it is characterized in that, described correction treatment process is: furnace temperature rises to samming behind the 600-700 ℃ of plastic deformation temperatures district with 100-200 ℃/programming rate hourly, after roll neck temperature to be deformed rises to 600 ℃, again rise to samming behind the 800-900 ℃ of humidity province with 100-200 ℃/hour programming rate, roll neck temperature to be deformed rises to 800-850 ℃, be incubated after 3-5 hour, furnace temperature with 50-100 ℃/per hour cooling rate with the distortion the near 100-150 of roll neck temperature ℃ humidity province after come out of the stove; In the roll neck temperature of control distortion, monitor body of roll temperature in the whole processing procedure.